Bombardier Inc.’s new management team has given the head of the Toronto Transit Commission “much greater confidence” that the city’s delay-plagued $1.2-billion streetcar order will be completed by 2019 as originally planned, TTC chief executive Andy Byford said Tuesday.

After multiple delays to the 204-streetcar order, the tense relationship between Bombardier and North America’s third-largest transit system had deteriorated to the point of name-calling. Last year, Byford...